Provide UK-specific integration tests.
Merge pull request #3093 from sergii-tkachenko/DS-377_uk-integration-tests

Provide UK-specific integration tests.
Remove an unnecessary Drush call to look up user account.
Remove unused campaign NID parameter.
Split configuration variables into a CasperJS config file.
Add log message to flood table method.
Don't use test fixtures for campaigns.
New test runner (allows for test configs).